Create its own Help Command for PythonScript

Edit the help webpage in Rhino plugin seems to be possible:

I’m looking for a way to edit this function from within a python script


I tried something like that but it is not working

import rhinoscriptsyntax as rs
import Rhino
from Rhino.Runtime import PythonScript

import webbrowser

__commandname__ = "python_edit_help"

class TestCommand(Rhino.Commands.Command):
    def OnHelp(self):"")
    def RunCommand(self, doc, mode):
        return Rhino.Commands.Result.Success

script = """
import rhinoscriptsyntax as rs
rs.GetString("Open Help toolbar or Press F1")

ps = PythonScript.Create()
ps.ScriptContextCommand = TestCommand()

anyone can help ?